The Tundja municipality cover the western part of District Yambol. Distinctiveness of Tundzha municipality is that it have no administrative center. The muncipality abuts upon the municipalities – Sliven, Straldja, Elhovo, Nova Zagora and Topolovgrad. The relief is flat and slightly hilly. The Manastirski elevations with abounding in pokcets of fines (granite) in the west are spread. In the east, among the field is situated the Haidouk Bakadjik. In the `heart` of the minucipality Sveti Iliiski elevations are located. The climate in Tunja area is transient-continental. The following rivers: Tundja, Kalnitsa and Mychyritsa pass through the are of the Toundzha Municipality. Mladovo – Bezmer canal for watering has been built , as well as a transport -derivation canal ` Ovcharitsa`, and 65 artifical lakes irrigates Tracian lowland.